[A few emotions battle their way across Alfredo's face: further confusion, recognition as he realizes how Rosetta's actions save Mami's life, awe...]

And you're being a good friend to her in turn, I'm sure.

[He's saying that genuinely.]

It seems like a massive level of trust, letting her do that for you. And if she is using that energy for something - that means you're helping each other, too.

[Which sounds like a VERY good thing for Mami in particular, that the relationship's not one-sided. Pokemon or not, that's important!]